Features&colon;1&period; Standard material &lpar;lean tube&comma; lean joints&comma; and lean accessories&rpar; design makes production systems&semi;2&period; The formation is simple&comma; flexible and free from the limitations of components shape&comma; space and space size&semi;3&period; Easy combination which can be always demanded to expand its structure and function&semi;4&period; It can continuously improve the production management&semi;5&period; Materials can be reused to reduce the production costs&semi;6&period; Improve production efficiency&period;